Subcontracting Percentage Limit

A subcontracting percentage limit sets a ceiling on how much of a contract's work can flow to third parties. It exists to ensure that the entity that won the contract on the basis of its own qualifications and experience is genuinely the one delivering the work, not acting as a pass-through for undisclosed firms.

What is a subcontracting percentage limit?

EU procurement law does not set a universal subcontracting cap across all contracts. Directive 2014/24/EU leaves it to contracting authorities to decide whether to impose a limit on a contract-by-contract basis, provided any limit is proportionate and justified by the nature of the works, supplies, or services. Where a limit is imposed, it must be stated in the contract notice or tender documents.

In construction and civil engineering, limits of 30% to 50% of the contract value are common in member state practice, reflecting national traditions around ensuring that the prime contractor performs a substantial core of the work. In services contracts, limits may be set on specific high-value workstreams (for example, core analytical or advisory functions) rather than the contract as a whole.

Directive 2009/81/EC (defence and security) gives authorities explicit power to impose subcontracting conditions, including percentage caps, as part of industrial participation and supply chain security requirements.

In framework agreements and dynamic purchasing systems, limits may be set at the individual call-off level rather than at the framework level.

UK position. The Procurement Act 2023 does not specify a statutory subcontracting cap. However, contracting authorities routinely include percentage limits in individual contracts, particularly for construction, facilities management, and professional services, as a condition of contract rather than a procurement selection criterion.

Why it matters for bidders

A subcontracting limit directly constrains your delivery model. If the limit is 40% and your intended delivery relies on 55% subcontracting, you must either restructure your supply chain, bring more work in-house, or reconsider your bid. Exceeding the limit after award is typically a material breach of contract, with consequences ranging from financial penalties to termination.

You should read the subcontracting limit alongside any mandatory subcontracting requirements. Where both apply, the mandatory minimum defines the floor and the percentage limit defines the ceiling: your subcontracting must fall within that range. For consortium bids, the limit applies to the consortium as a whole, not to each individual member, so the lead partner must understand how the combined delivery model sits within the cap.

Example

An Irish facilities management company wins a hospital maintenance contract with a 35% subcontracting cap. It plans to subcontract electrical maintenance (10%), cleaning services (15%), and waste management (8%), totalling 33% of contract value. This sits within the cap. If it subsequently wishes to subcontract additional groundskeeping work worth 5%, it would breach the cap and must seek the authority's consent or restructure.

Frequently Asked Questions

Is the subcontracting percentage limit calculated by value or by scope?

Most contracts specify the limit by value (as a percentage of contract price). Some, particularly in construction, define it by scope or work package. The basis of calculation should be stated in the contract conditions; if it is not clear, seek clarification before bidding.

Can the contracting authority waive the limit in exceptional circumstances?

In some cases, yes. Where unforeseen circumstances arise during performance (for example, the insolvency of a subcontractor), the authority may consent to adjusted subcontracting arrangements. This is handled through contract variation provisions rather than by simply ignoring the original limit.

Does the limit apply to goods purchased by the contractor?

Generally no. Subcontracting limits typically apply to works or services elements of the contract. Routine procurement of materials, components, or off-the-shelf goods is not usually counted toward the subcontracting percentage, though contracts vary and you should check the specific wording.